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United States Patent | 5,141,119 |
Milazzo | August 25, 1992 |
The method of the invention includes moving a control stick to fix the boom in the desired position, and then locking the stick in the desired position so that the operator cannot move the stick. The apparatus of the invention includes a bracket connected to the cab of the crane for receipt of a control stick, and a lock for connecting the control stick to the bracket.
Inventors: | Milazzo; James D. (13046 Gurney La., Baton Rouge, LA 70818) |
Appl. No.: | 688983 |
Filed: | April 22, 1991 |
Current U.S. Class: | 212/290; 70/212; 212/292 |
Intern'l Class: | B60R 025/02 |
Field of Search: | 212/159,160,162-165 200/43.01,43.11,43.15,43.16,43.19,43.21 91/41 70/210,211,212,244,247 |
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3092261 | Jun., 1963 | Nesbit | 212/59. |
3426164 | Feb., 1969 | Dessert | 200/43. |
3561610 | Feb., 1971 | Buckert | 212/39. |
3599801 | Aug., 1971 | Roll | 212/162. |
3601169 | Aug., 1971 | Hamilton | 212/162. |
3678228 | Jul., 1972 | Adamson | 200/43. |
3961685 | Jun., 1976 | Kozai | 182/19. |
4043253 | Aug., 1977 | Albright | 92/25. |
4566599 | Jan., 1986 | Villa et al. | 212/168. |
4677261 | Jun., 1987 | Nourry | 200/43. |
4733029 | Mar., 1988 | Kobayashi et al. | 200/43. |
4759424 | Jul., 1988 | Rolleri | 70/247. |
4825670 | May., 1989 | Snow | 70/247. |
4888968 | Dec., 1989 | Azvedo | 70/212. |
5042754 | Aug., 1991 | Heath | 70/211. |
Foreign Patent Documents | |||
527448 | Oct., 1956 | BE | 200/43. |
1061494 | Jul., 1959 | DE | 212/165. |
1157754 | Nov., 1963 | DE | 212/165. |
909717 | May., 1946 | FR | 70/212. |
89931 | Aug., 1954 | NO | 212/165. |
1064665 | Apr., 1967 | GB | 212/162. |
1202530 | Aug., 1970 | GB | 212/164. |
2214885 | Sep., 1989 | GB | 70/247. |